Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d0b2be6a1762595…

MALICIOUS

PDF

86.1 KB Created: 2021-07-17 11:44:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 70ecdcafb81aead96d36fed5beec6675 SHA-1: cdb52173c5d56790f1a9f58b63211140aa964165 SHA-256: 1d0b2be6a17625953348f255aa24e508e3d4bf58c543b83afae2ce73bbf93554
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to facilitate phishing or malware delivery through these external resources. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://bancodevida.com/bancodevida/admin/images/image/file/67987993531.pdf In PDF document text
    • http://boek.se/bilder_umeny/File/74603996318.pdfIn PDF document text
    • http://maslag.eu/userfiles/file/palel.pdfIn PDF document text
    • http://aptchasers.com/FCKeditor/userfiles/file/17214820465.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16086ba753f7d3---12733566349.pdfIn PDF document text
    • http://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/fuxalufobafivimik.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/f0e1705f8ab1d2788982d75cf0c18de5/79072418511.pdfIn PDF document text
    • http://csc028.com/userfiles/file/20210618001817_bue8si.pdfIn PDF document text
    • http://quanhoangtsi.com/upload/quangtri/files/zasodazopoxepofogotirapi.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/8cc845f4c728b1fbbd74b4682b1d7364/1624424299.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/22698211424.pdfIn PDF document text
    • https://suadienlanhhanoi.net/upload/files/zuwavosaz.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a921ea286---98764583580.pdfIn PDF document text
    • http://builderall.info/userfiles/file/89175454803.pdfIn PDF document text
    • http://waelfawzy.com/userfiles/file/kowomijoxalivawopas.pdfIn PDF document text
    • https://opuntia.eu/wp-content/plugins/super-forms/uploads/php/files/a5e8d7e8472515ce06198897046f48ff/juvelanaro.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/7fb68b35655d4b069e9909610ddff50f/63188399823.pdfIn PDF document text
    • http://citra.cl/userfiles/file/64815491363.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/4l4f1lqp4gnl20r6o7air9ofvo/veranetixo.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a65b969ddc0---56785157562.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/61eb050e67b9a76b190318164801e25f/97628715248.pdfIn PDF document text
    • http://beachhigh65.com/clients/879402/File/bobelupebesisifosori.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072701c3c0d7---6197614080.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/14d78orfgaakd0a7igcb41ph77/befirepelusa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=culture+and+communication+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5B 10744 bytes
SHA-256: c1310e885533171e1e85a5a39885c1c31afd98643fb379d6feb1c5b81cdfda3d
font_01_sfnt_off00010701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10701 16416 bytes
SHA-256: d8c2684f0cbf8c0cecda3ef7b5bdad7b4670621785c6ac0f6380f89316bf79f6
font_02_sfnt_off0001316c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1316C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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